Infiniti G37 Coupe. Manual - part 1130

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

SEC-17

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

System Diagram

INFOID:0000000001699909

System Description

INFOID:0000000001699910

INPUT/OUTPUT SIGNAL CHART

SYSTEM DESCRIPTION

• The IVIS (NATS) is an anti-theft system by registering an Intelligent Key ID in to the vehicle and prevents the

engine being started by an unregistered Intelligent Key. It has a higher protection against auto thefts that
duplicate mechanical key.

• It performs the ID verification when starting the engine in the same way as the Intelligent Key system. But, it

performs the IVIS (NATS) ID verification when inserting the Intelligent Key and performs the Intelligent Key
ID verification when carrying the Intelligent Key.

• The Intelligent Key system of V36 is not the same as the conventional models. The mechanical key inte-

grated in the Intelligent Key cannot start the engine. When the Intelligent Key battery is discharged, the IVIS
(NATS) ID verification memorized to the transponder integrated with Intelligent Key is performed by inserting
the Intelligent Key into the key slot. If the verification results are OK, the engine start operation can be per-
formed by the push-button ignition switch operation.

• Locate the security indicator and apply the anti-theft system equipment sticker, forewarn that the IVIS

(NATS) is onboard with the model.

• The security indicator always blinks when the Intelligent Key is removed from the key slot and when the

power supply position is in LOCK position.

• Intelligent Key can be registered up to 4 keys (Including the standard ignition key) on request from the

owner.

JMKIA0058GB

Switch

Input signal to BCM

BCM function

Actuator

Push-button ignition switch

Push switch

IVIS (NATS)

• Steering lock relay
• Steering lock unit
• Starter relay (IPDM E/R)
• Starter control relay (IPDM E/R)
• Starter motor
• KEY warning lamp
• Security indicator lamp

AT device (A/T models)

P range

PNP switch (A/T models)

N, P range

Clutch interlock switch (M/T models)

Clutch ON/OFF

ASCD clutch switch (M/T models with ASCD)

Clutch ON/OFF

ICC clutch switch (M/T models with ICC)

Clutch ON/OFF

Stop lamp switch

Brake ON/OFF

Key slot

Key ID

Each door switch

Door open/close

ECM

Engine status signal

SEC-18

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

• The specified registration is required when replacing ECM, BCM or Intelligent Key. The registrations proce-

dure for IVIS (NATS) and registration procedure for Intelligent Key when installing the BCM, refer to CON-
SULT-III Operation Manual NATS-IVIS/NVIS.

• Possible symptom of IVIS (NATS) malfunction is “Engine cannot start”. In V36, the engine can be started

with the Intelligent Key system and IVIS (NATS). Identify the possible causes according to “Work Flow”,
Refer to 

SEC-5, "Work Flow"

.

• If ECM other than Genuine NISSAN is installed, the engine cannot be started. For ECM replacement proce-

dure, refer to 

SEC-8, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

.

PRECAUTIONS FOR KEY REGISTRATION

• The key registration is a procedure that erases the current IVIS (NATS) ID once, and then re-registers a new

ID operation. Therefore the registered Intelligent Key is necessary for this procedure. Before starting the reg-
istration operation collect all registered Intelligent Keys from the customer

• When registering the Intelligent Key, performs only one procedure to register simultaneously both ID (IVIS

“NATS” ID registration and Intelligent Key ID registration).
The IVIS (NATS) ID registration is the procedure that registers the ID stored into the transponder (integrated
in Intelligent Key) to BCM.
The Intelligent key ID registration is the procedure that registers the ID to BCM.

• When performing the Intelligent Key system registration only, the engine cannot be started by inserting the

key into the key slot. When performing the IVIS (NATS) registration only, the engine cannot be started by the
operation when carrying the key. The registrations of both systems should be performed.

SECURITY INDICATOR

• Warns that the vehicle is equipped with IVIS (NATS).
• The security indicator always blinks when the Intelligent Key is removed from the key slot and when the igni-

tion switch is in LOCK position.

NOTE:
Because security indicator is highly efficient, the battery is barely affected.

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

SEC-19

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

C

D

E

F

G

H

I

J

L

M

A

B

SEC

N

O

P

Component Parts Location

INFOID:0000000001699911

1.

BCM M118, M119, M121, M122, M123

2.

IPDM E/R E5, E6, E7

3.

Remote keyless entry receiver 
M104 

4.

Inside key antenna (console) M146

5.

Outside key antenna (rear bumper) 
B63

6.

Inside key antenna (trunk room) 
B49

7.

Front outside handle LH (request switch) 
D13

8.

Front outside handle LH (outside key 
antenna) D14 

9.

Unified meter and A/C AMP M66, 
M67

10. Inside key antenna (instrument center) 

M131

11. Trunk lid request switch B304

12. Intelligent Key warning buzzer (en-

gine room) E57 

JMKIA1118ZZ

SEC-20

< FUNCTION DIAGNOSIS >

[INTELLIGENT KEY SYSTEM]

INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS

A.

Dash side lower (Passenger side).

B.

Engine room dash panel (RH).

C.

 View with instrument assist lower 
panel removed.

D.

View with console rear finisher removed. E.

View with rear bumper removed.

F.

View with trunk rear finisher (up-
per) removed.

G.

View of front door LH.

H.

Behind cluster lid C.

I.

View with hood seal assembly re-
moved.

1.

Horn relay1 E11

2.

ECM M107

3.

Push-button ignition switch M50

4.

Combination meter (Security indica-
tor) M53 

5.

Stop lamp switch E110

6.

Steering lock unit M40

7.

Clutch interlock switch E111

8.

Horn (high) E61, E62

9.

Horn (low) E69, E70

JMKIA1271ZZ